Has her english improved yet?
I think 3 months should be plenty of time to become functional as 1784 said. Although, I am native english speaker. But I do think being submerged in an environment such as university where you can almost force yourself to hear and speak english everyday you can...
Big Tip is to practise. Another, is find a Canadian roommate.
The worst thing you can do is to come to Canada or any english speaking country and not try to make friends with the engish speaking country citizens. It would be like me visiting a town in china where there is little english...